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Sponges [porifera], the most ancient metazoans, contain modules related to the vertebrate immune system, including the 2′,5′-oligoadenylate synthetase (OAS). The components of the antiviral 2′,5′-oligoadenylate (2–5A) system (OAS, 2′-Phosphodiesterase (2′-PDE) and RNAse L) of vertebrates have not all been identified in sponges. Here, we demonstrate for the first time that in addition to the OAS activity,...
Heavy metals are among the main pollutants of the Mediterranean coastal waters where they can harm sublittoral biota. Filter-feeder, long-living invertebrates that remain fixed to the rocky bottom, such as sponges, are good targets to metal contamination studies since they may be exposed to potential low levels of contamination for years. Several molecular and biochemical mechanisms are developed...
The 2′-5′-oligoadenylate synthetase (OAS) belongs to a nucleotidyl transferase family that includes poly(A) polymerases and CCA-adding enzymes. In mammals and birds, the OAS functions in the interferon system but it is also present in an active form in sponges, which are devoid of the interferon system. In view of these observations, we have pursued the idea that OAS genes could be present in other...
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